Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3276545
Keywords
chemical sensors; copper; electromagnetic waves; polaritons; surface plasmons; surface texture; terahertz wave spectra; terahertz waves; transmission electron microscopy
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Funding
- Air Force Office of Scientific Research
- Spanish Ministry of Science [MAT2008-06609-C02, CSD2007-046-Nanolight.es]
- Engineering and Physical Sciences Research Council [EP/D063329/1] Funding Source: researchfish
- EPSRC [EP/D063329/1] Funding Source: UKRI
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We report studies of the guiding of terahertz radiation on a copper surface textured with an array of blind annular holes. The structure supports two tightly bound surface plasmon-polaritonlike electromagnetic waves associated with TE(11) and TEM coaxial waveguide modes. The TE(11)-like surface mode has a cutoff determined by the array period while the TEM mode can be arranged to have a lower frequency cut-off by adjusting the hole depth. The ability to guide two modes in independently variable bands could be useful in quantitative chemical sensing.
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